Portion of a footwear sole



FIG. 1 is a perspective view of the portion of a footwear sole embodying the new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a front elevational view thereof; and,

FIG. 6 is a rear elevational view thereof.

FIGS. 1-6 show portions of a sole in broken lines. The broken line portions are shown for environmental purposes and does not form any part of the claimed design.

The broken lines immediately adjacent to the solid lines in the views, define the boundary of the design. The broken line itself forms no part of the claim. 

The ornamental design for portion of a footwear sole, as shown and described. 